Waterproofing material



IINTTED STATES PATENT Unmcn.

CHARLES SMITH, OF NEENAII, IVISOONSIN.

WATERPROOFING MATERIAL.

SPECIFICATION forming part of Letters Patent No. 607,773, dated July 19, 1898.

Application filed September 9, 1896. Serial No. 605,325. (No specimens.)

To all whom, it may concern:

Be it known that 1, CHARLES R. SMITH, a resident of Neenah, in the county of WVinnebago and State of WVisconsin, have invented certain new and useful Improvementsin'Waterproofing Materials; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appert-ains to make and use the same.

My invention relates to an improvement in waterproofing material, the object of the invention being to provide materials for waterproofing fiber and other material which shall reduce the cost of such treatment to a minimum and at the same time result in awaterproof coating which shall possess adequate tenacity and power of penetrating the fiber and which will act to effectually exclude all moisture from the fiber.

I first prepare a compound consisting-of corn-oil and a gummy or resinous material, preferably rosin, in about the proportions of seventy per cent. of corn-oil to thirty per cent. of rosin. By the term gummy it is intended to include only substances commonly used for varnishes, which, though technically resins, are known in the trade as gums. The corn-oil will first be heated to a temperature sufiicient to drive out all moisture, (preferably about 500 Fal1renheit,) and then the rosin will be added. The compound thus made is not in any degree dangerous, as it is not inflammable, the use of naphtha or similar liquid heretofore employed being dispensed with.

When the temperature of the compound shall have diminished to about 350 Fahrenheit, (more or less,) the article to be treated for waterproofing it will be immersed in the compound and allowed to remain therein a length of time sufficient to absorb an amount of the compoundequal to about one-fourth its own weight. The article will then be re moved and dried or baked, after which the surface coating will be smoothed by sanding or in any other preferred manner.

The -article will then be dipped into afinishing compound consisting of corn-oil, linseed-oil, and rosin or other gummy or resinous material, the oil having been first boiled, so as to thicken it, before the rosin is added, whereby the fin-.

ishing compound will be of such consistency that an'adequate coating can be applied to the article with a minimum number of applications. For treating ordinary pulp pails the finishing compound may consist of seventy-five parts of corn-oil, seventy-five parts of linseed-oil, and fifty parts of rosin. waterproofing some other articles the proportions may be varied more or less to advantage. When a more elastic or pliable coating is desired, the proportion of oil in both compounds will be increased and that of rosin diminished. When a harder coating is desired, a larger proportion of rosin and a smaller proportion of oil than those above specified will be used.

After the article shall have been subjected to the finishing compound it will be again dried or baked. If desired, the article may be several times subjected to the finishing compound and dried or baked after each application of the compound.

Extensive experiment has demonstrated the value of corn-oil for waterproofing. It is very penetrating. Its cost is small and is effectual in the performance of its functions.

Having fully described myinvention, what I claim as new, and desire to secure by Letters Patent, is-

1. A waterproofing material consisting of corn-oil and a gummy or resinous substance, substantially as set forth.

2. A waterproofing compound consisting of corn-oil, linseed oil and a gummy or resinous substance, substantially as set forth.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

CHARLES B. SMITH.

IVitnesses:

H. J. MAYER, W. H. MINER.

For 

